package regist;
import javax.crypto.Cipher; 
import javax.crypto.spec.SecretKeySpec; 
 
/** 
 * 
 * @author Administrator 
 * 
 */ 
public class AES { 
	 
    // 加密 
    public static byte[] encrypt(String sSrc, String sKey) throws Exception { 
        if (sKey == null) { 
            System.out.print("Key为空null"); 
            return null; 
        } 
        // 判断Key是否为16位 
        if (sKey.length() != 16) { 
            System.out.print("Key长度不是16位"); 
            return null; 
        } 
        byte[] raw = sKey.getBytes("utf-8"); 
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES"); 
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式" 
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec); 
        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8")); 
        return encrypted;
    } 
 
 // 解密
    public static String decrypt(byte[] encrypted1, String sKey) throws Exception {
        try {
            // 判断Key是否正确
            if (sKey == null) {
                System.out.print("Key为空null");
                return null;
            }
            // 判断Key是否为16位
            if (sKey.length() != 16) {
                System.out.print("Key长度不是16位");
                return null;
            }
            byte[] raw = sKey.getBytes("utf-8");
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec);
            try {
                byte[] original = cipher.doFinal(encrypted1);
                String originalString = new String(original,"utf-8");
                return originalString;
            } catch (Exception e) {
            	e.printStackTrace();
                System.out.println(e.toString());
                return null;
            }
        } catch (Exception ex) {
            System.out.println(ex.toString());
            return null;
        }
    }

    
 
    public static void main(String[] args) throws Exception { 
        /* 
         * 此处使用AES-128-ECB加密模式，key需要为16位。 
         */ 
        // 需要加密的字串 
    	String cKey = "tuorenzhinenghua"; 
        String cSrc = "43186642383902B4&a1xJ4qC587v&89860471162180041210"; 
        System.out.println(cSrc); 
        // 加密 
        byte[] enString = AES.encrypt(cSrc, cKey); 
        for(byte a:enString)
		 {
			 System.out.printf("%02x",a);
		 }
       String result = AES.decrypt(enString, cKey);
       System.out.println("\r\naes decrypt:"+result);

       
    } 
} 
 
